Philips PET836 Service Manual page 28

5
CIRCUIT DIAGRAM- MAIN BOARD_FLASH&SDRAM
D
U8 U8
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
AT24C02 AT24C02
GND
I2C ADDR = 0XA0
C
U9 U9
SPI_CE
1 8
CE# VDD
DQ0
2 7
DOUT HOLD#
SPI_WP
3 6
WP# SCK
4 5
GND
GND DIN
EN25T16 EN25T16
DQ0 R70 R70 NC/0402 NC/0402 DQ1
For 1bit SPI Flash
SPI_D0 R71 R71 0/0402 0/0402
SPI_D1 R72 R72 0/0402 0/0402
R73 R73 10K/0402 10K/0402
SPI_VCC3
B
R74 R74 10K/0402 10K/0402
SD_VCC3
EC22 EC22
100uF/6.3V 100uF/6.3V 0.1uF/16V/0402 0.1uF/16V/0402
GND
SD_VCC3
A
C91 C91
100pF/50V/0402 100pF/50V/0402 100pF/50V/0402 100pF/50V/0402
GND
5
4
DVCC
R67 R67
R68 R68
4.7K/0402 4.7K/0402 4.7K/0402 4.7K/0402
DVCC
GND
I2C_CLK 2,8
I2C_DATA 2,8
SPI_VCC3
SPI_HOLD
SPI_CLK
DQ1 R86 R86 0/0402 0/0402
DQ0
DQ1
SPI_WP
SPI_HOLD
C191 C191 C85 C85 C104 C104 C99 C99 C208 C208
0.1uF/16V/0402 0.1uF/16V/0402 0.1uF/16V/0402 0.1uF/16V/0402 0.1uF/16V/0402 0.1uF/16V/0402
0.1uF/16V/0402 0.1uF/16V/0402
C92 C92 C214 C214
100pF/50V/0402 100pF/50V/0402
4
3
M_A0
M_A1
M_A2
M_A3
M_A4
M_A5
M_A6
M_A7
M_A8
M_A9
M_A10
M_A11
M_DQM0
M_DQM1
M_WE
M_CAS
M_RAS
GND
SD_VCC3
M_CLK R69 R69 33/0402 33/0402 RAM_CLK
M_BA0
C43 C43 10pF/0402 10pF/0402 M_BA1
GND
GND
SD_VCC3
C207 C207 C100 C100
0.1uF/16V/0402 0.1uF/16V/0402 0.1uF/16V/0402 0.1uF/16V/0402
C132 C132
100pF/16V/0402 100pF/16V/0402
GND
3
2
U7 U7
M_D0
23 2
A0 D0
M_D1
24 4
A1 D1
M_D2
25 5
A2 D2
M_D3
26 7
A3 D3
M_D4
29 8
A4 D4
M_D5
30 10
A5 D5
M_D6
31 11
A6 D6
M_D7
32 13
A7 D7
M_D8
33 42
A8 D8
M_D9
34 44
A9 D9
M_D10
22 45
A10/AP D10
M_D11
35 47
A11 D11
M_D12
15 48
LDQM D12
M_D13
39 50
UDQM D13
M_D14
16 51
WE D14
M_D15
17 53
CAS D15
18 36
RAS NC
19 40
CS NC/RFU
37 28
CKE VSS GND
38 41
CLK VSS
20 54
BA0 VSS
21 1
SD_VCC3
BA1 VDD
14
VDD
27
VDD
6 3
VSSq VDDq
12 9
VSSq VDDq
46 43
VSSq VDDq
52 49
VSSq VDDq
SDRAM 1Mx16x4 SDRAM 1Mx16x4
C219 C219 C220 C220
100pF/16V/0402 100pF/16V/0402 100pF/16V/0402 100pF/16V/0402
2
1
D
C
SPI_VCC3
EC23 EC23 BC32 BC32 C215 C215
10uF/16V 10uF/16V 0.1uF 0.1uF 100pF/50V/0402 100pF/50V/0402
GND
SPI Mode Setting
2bit 1bit
R119
NC 0
B
R121
0 NC
M_A[0..11] 2
M_D[0..15] 2
M_DQM[0..1] 2
M_A11
M_A11 2
M_CAS
M_CAS 2
M_RAS
M_RAS 2
M_WE
M_WE 2
M_BA0
M_BA0 2
M_BA1
M_BA1 2
M_CLK
M_CLK 2
SPI_D0
SPI_D0 2
SPI_D1
SPI_D1 2
SPI_CE
SPI_CE 2
SPI_CLK
SPI_CLK 2
A
1